Brückner test

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The Brückner test (also: fluoroscopic test according to Brückner ) is a simple and orienting examination method for strabismus diseases . It is mainly used in patients who are unable to fix a point of light for a long time in order to carry out a masking test (infants, toddlers, people with limited disabilities). The examination is carried out with an ophthalmoscope and is used to assess the foveolar reflex ("red eyes" on photos). If there is no squint, the pupil glow is the same on both sides (in children it is generally more gray-red). However, if there is a manifest strabismus , the pupil of the cross-eyed eye has a more light red color, due to the reflex from the extrafoveal retinal and choroidal areas . The asymmetry of the light reflexes is easier to see with pupils that are not dilated than with pupils that are e.g. B. by a mydriatic previously medically expanded. In principle, every unclear finding of the fundus reflexes should be clarified in detail.

If the Brückner test is used at different distances (1–5 meters), a statement can also be made about existing higher-grade anisometropies .

The Brückner test is a purely qualitative investigation and does not provide any information about the exact extent of a squint angle in degrees or prism diopters.

See also